ECOPERSIAIQBQBasic Scienceshttp://journals.modares.ac.ir1admin2322-27002538-2152enjalali139391gregorian201412124online1fulltextenSpatial and Temporal Trend Analysis of Temperature and Precipitation in Iran<span style="font-size: 10pt; font-family: 'Times New Roman','serif'; color: black; line-height: 115%; mso-fareast-font-family: Calibri; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA;">Analysis of the spatial and temporal trends of precipitation and temperature are pertinent for future development and sustainable management of water resources in a given region. In this paper, we present a study concerning the climatic behavior of two principal observables Variables, viz. monthly temperature (maximum and minimum) and mean precipitations obtained from the measurements carried out in 60 Iranian meteorological stations for 40 years from 1969 to 2008. The Mann-Kendall test was used to detect the significant trends.Results showed that during summer and autumn, the precipitation had a negative trend (at 5% significant level) in the south-eastern parts of Iran and this trend is less during spring, but no special trend was observed in winter. The minimum and the maximum temperatures did not have any particular trend in winter. Spring was accompanied by an increase in positive trend in the maximum temperatures in the south-west and north-east, while the minimum temperature only limited in the south-west parts. Positive and negative trends of the minimum temperature were very dispersed during the summer. The maximum temperatures had a negative trend in the north-west and no positive trend was observed at 5% significant level. During autumn, the temperatures indices had positive and negative trends with a wide range of dispersion.</span>Climate Change,Climatic variables,Iran,Mann-Kendall,Spatial distribution727742http://journals.modares.ac.ir/browse.php?a_code=A-24-1000-4621&slc_lang=en&sid=24VahidFeiziVahidFeizi100319475328460057590100319475328460057590Yes
PhD Candidate in Geography, Climatology, Tehran University, IranPhD Candidate in Geography, Climatology, Tehran University, IranMaryamMollashahiMaryamMollashahi100319475328460057589100319475328460057589NoAssistant Professor of Forestry in Arid Regions, Faculty of Desert Study, Semnan University, IranAssistant Professor of Forestry in Arid Regions, Faculty of Desert Study, Semnan University, IranManochehrFarajzadehManochehrFarajzadeh100319475328460057588100319475328460057588NoAssociate Professor in Geography, Climatology, Tarbiat Modarres University, IranAssociate Professor in Geography, Climatology, Tarbiat Modarres University, IranGhasemAziziGhasemAzizi100319475328460057307100319475328460057307NoAssociate Professor in Geography, Climatology, Tehran University, IranAssociate Professor in Geography, Climatology, Tehran University, Iran